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authorChristoph Hellwig <hch@lst.de>2018-11-04 20:29:28 +0100
committerChristoph Hellwig <hch@lst.de>2018-12-01 18:07:11 +0100
commit0c3b3171ceccb8830c2bb5adff1b4e9b204c1450 (patch)
treec7dbe5478677405c690334e59acc392c5db86858 /arch/arm64/Kconfig
parentdma-mapping: move the remap helpers to a separate file (diff)
downloadlinux-dev-0c3b3171ceccb8830c2bb5adff1b4e9b204c1450.tar.xz
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dma-mapping: move the arm64 noncoherent alloc/free support to common code
The arm64 codebase to implement coherent dma allocation for architectures with non-coherent DMA is a good start for a generic implementation, given that is uses the generic remap helpers, provides the atomic pool for allocations that can't sleep and still is realtively simple and well tested. Move it to kernel/dma and allow architectures to opt into it using a config symbol. Architectures just need to provide a new arch_dma_prep_coherent helper to writeback an invalidate the caches for any memory that gets remapped for uncached access. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to '')
-rw-r--r--arch/arm64/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5d065acb6d10..2e645ea693ea 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -82,7 +82,7 @@ config ARM64
select CRC32
select DCACHE_WORD_ACCESS
select DMA_DIRECT_OPS
- select DMA_REMAP
+ select DMA_DIRECT_REMAP
select EDAC_SUPPORT
select FRAME_POINTER
select GENERIC_ALLOCATOR